--- /dev/null
+/*
+ * Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org>
+ * Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com>
+ * Copyright (c) 2007-2008 Luis Rodriguez <mcgrof@winlab.rutgers.edu>
+ * Copyright (c) 2007-2008 Pavel Roskin <proski@gnu.org>
+ * Copyright (c) 2007-2008 Jiri Slaby <jirislaby@gmail.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+/****************************\
+ Reset function and helpers
+\****************************/
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <asm/unaligned.h>
+
+#include <linux/pci.h> /* To determine if a card is pci-e */
+#include <linux/log2.h>
+#include <linux/platform_device.h>
+#include "ath5k.h"
+#include "reg.h"
+#include "debug.h"
+
+
+/**
+ * DOC: Reset function and helpers
+ *
+ * Here we implement the main reset routine, used to bring the card
+ * to a working state and ready to receive. We also handle routines
+ * that don't fit on other places such as clock, sleep and power control
+ */
+
+
+/******************\
+* Helper functions *
+\******************/
+
+/**
+ * ath5k_hw_register_timeout() - Poll a register for a flag/field change
+ * @ah: The &struct ath5k_hw
+ * @reg: The register to read
+ * @flag: The flag/field to check on the register
+ * @val: The field value we expect (if we check a field)
+ * @is_set: Instead of checking if the flag got cleared, check if it got set
+ *
+ * Some registers contain flags that indicate that an operation is
+ * running. We use this function to poll these registers and check
+ * if these flags get cleared. We also use it to poll a register
+ * field (containing multiple flags) until it gets a specific value.
+ *
+ * Returns -EAGAIN if we exceeded AR5K_TUNE_REGISTER_TIMEOUT * 15us or 0
+ */
+int
+ath5k_hw_register_timeout(struct ath5k_hw *ah, u32 reg, u32 flag, u32 val,
+ bool is_set)
+{
+ int i;
+ u32 data;
+
+ for (i = AR5K_TUNE_REGISTER_TIMEOUT; i > 0; i--) {
+ data = ath5k_hw_reg_read(ah, reg);
+ if (is_set && (data & flag))
+ break;
+ else if ((data & flag) == val)
+ break;
+ udelay(15);
+ }
+
+ return (i <= 0) ? -EAGAIN : 0;
+}
+
+
+/*************************\
+* Clock related functions *
+\*************************/
+
+/**
+ * ath5k_hw_htoclock() - Translate usec to hw clock units
+ * @ah: The &struct ath5k_hw
+ * @usec: value in microseconds
+ *
+ * Translate usecs to hw clock units based on the current
+ * hw clock rate.
+ *
+ * Returns number of clock units
+ */
+unsigned int
+ath5k_hw_htoclock(struct ath5k_hw *ah, unsigned int usec)
+{
+ struct ath_common *common = ath5k_hw_common(ah);
+ return usec * common->clockrate;
+}
+
+/**
+ * ath5k_hw_clocktoh() - Translate hw clock units to usec
+ * @ah: The &struct ath5k_hw
+ * @clock: value in hw clock units
+ *
+ * Translate hw clock units to usecs based on the current
+ * hw clock rate.
+ *
+ * Returns number of usecs
+ */
+unsigned int
+ath5k_hw_clocktoh(struct ath5k_hw *ah, unsigned int clock)
+{
+ struct ath_common *common = ath5k_hw_common(ah);
+ return clock / common->clockrate;
+}
+
+/**
+ * ath5k_hw_init_core_clock() - Initialize core clock
+ * @ah: The &struct ath5k_hw
+ *
+ * Initialize core clock parameters (usec, usec32, latencies etc),
+ * based on current bwmode and chipset properties.
+ */
+static void
+ath5k_hw_init_core_clock(struct ath5k_hw *ah)
+{
+ struct ieee80211_channel *channel = ah->ah_current_channel;
+ struct ath_common *common = ath5k_hw_common(ah);
+ u32 usec_reg, txlat, rxlat, usec, clock, sclock, txf2txs;
+
+ /*
+ * Set core clock frequency
+ */
+ switch (channel->hw_value) {
+ case AR5K_MODE_11A:
+ clock = 40;
+ break;
+ case AR5K_MODE_11B:
+ clock = 22;
+ break;
+ case AR5K_MODE_11G:
+ default:
+ clock = 44;
+ break;
+ }
+
+ /* Use clock multiplier for non-default
+ * bwmode */
+ switch (ah->ah_bwmode) {
+ case AR5K_BWMODE_40MHZ:
+ clock *= 2;
+ break;
+ case AR5K_BWMODE_10MHZ:
+ clock /= 2;
+ break;
+ case AR5K_BWMODE_5MHZ:
+ clock /= 4;
+ break;
+ default:
+ break;
+ }
+
+ common->clockrate = clock;
+
+ /*
+ * Set USEC parameters
+ */
+ /* Set USEC counter on PCU*/
+ usec = clock - 1;
+ usec = AR5K_REG_SM(usec, AR5K_USEC_1);
+
+ /* Set usec duration on DCU */
+ if (ah->ah_version != AR5K_AR5210)
+ AR5K_REG_WRITE_BITS(ah, AR5K_DCU_GBL_IFS_MISC,
+ AR5K_DCU_GBL_IFS_MISC_USEC_DUR,
+ clock);
+
+ /* Set 32MHz USEC counter */
+ if ((ah->ah_radio == AR5K_RF5112) ||
+ (ah->ah_radio == AR5K_RF2413) ||
+ (ah->ah_radio == AR5K_RF5413) ||
+ (ah->ah_radio == AR5K_RF2316) ||
+ (ah->ah_radio == AR5K_RF2317))
+ /* Remain on 40MHz clock ? */
+ sclock = 40 - 1;
+ else
+ sclock = 32 - 1;
+ sclock = AR5K_REG_SM(sclock, AR5K_USEC_32);
+
+ /*
+ * Set tx/rx latencies
+ */
+ usec_reg = ath5k_hw_reg_read(ah, AR5K_USEC_5211);
+ txlat = AR5K_REG_MS(usec_reg, AR5K_USEC_TX_LATENCY_5211);
+ rxlat = AR5K_REG_MS(usec_reg, AR5K_USEC_RX_LATENCY_5211);
+
+ /*
+ * Set default Tx frame to Tx data start delay
+ */
+ txf2txs = AR5K_INIT_TXF2TXD_START_DEFAULT;
+
+ /*
+ * 5210 initvals don't include usec settings
+ * so we need to use magic values here for
+ * tx/rx latencies
+ */
+ if (ah->ah_version == AR5K_AR5210) {
+ /* same for turbo */
+ txlat = AR5K_INIT_TX_LATENCY_5210;
+ rxlat = AR5K_INIT_RX_LATENCY_5210;
+ }
+
+ if (ah->ah_mac_srev < AR5K_SREV_AR5211) {
+ /* 5311 has different tx/rx latency masks
+ * from 5211, since we deal 5311 the same
+ * as 5211 when setting initvals, shift
+ * values here to their proper locations
+ *
+ * Note: Initvals indicate tx/rx/ latencies
+ * are the same for turbo mode */
+ txlat = AR5K_REG_SM(txlat, AR5K_USEC_TX_LATENCY_5210);
+ rxlat = AR5K_REG_SM(rxlat, AR5K_USEC_RX_LATENCY_5210);
+ } else
+ switch (ah->ah_bwmode) {
+ case AR5K_BWMODE_10MHZ:
+ txlat = AR5K_REG_SM(txlat * 2,
+ AR5K_USEC_TX_LATENCY_5211);
+ rxlat = AR5K_REG_SM(AR5K_INIT_RX_LAT_MAX,
+ AR5K_USEC_RX_LATENCY_5211);
+ txf2txs = AR5K_INIT_TXF2TXD_START_DELAY_10MHZ;
+ break;
+ case AR5K_BWMODE_5MHZ:
+ txlat = AR5K_REG_SM(txlat * 4,
+ AR5K_USEC_TX_LATENCY_5211);
+ rxlat = AR5K_REG_SM(AR5K_INIT_RX_LAT_MAX,
+ AR5K_USEC_RX_LATENCY_5211);
+ txf2txs = AR5K_INIT_TXF2TXD_START_DELAY_5MHZ;
+ break;
+ case AR5K_BWMODE_40MHZ:
+ txlat = AR5K_INIT_TX_LAT_MIN;
+ rxlat = AR5K_REG_SM(rxlat / 2,
+ AR5K_USEC_RX_LATENCY_5211);
+ txf2txs = AR5K_INIT_TXF2TXD_START_DEFAULT;
+ break;
+ default:
+ break;
+ }
+
+ usec_reg = (usec | sclock | txlat | rxlat);
+ ath5k_hw_reg_write(ah, usec_reg, AR5K_USEC);
+
+ /* On 5112 set tx frame to tx data start delay */
+ if (ah->ah_radio == AR5K_RF5112) {
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_RF_CTL2,
+ AR5K_PHY_RF_CTL2_TXF2TXD_START,
+ txf2txs);
+ }
+}
+
+/**
+ * ath5k_hw_set_sleep_clock() - Setup sleep clock operation
+ * @ah: The &struct ath5k_hw
+ * @enable: Enable sleep clock operation (false to disable)
+ *
+ * If there is an external 32KHz crystal available, use it
+ * as ref. clock instead of 32/40MHz clock and baseband clocks
+ * to save power during sleep or restore normal 32/40MHz
+ * operation.
+ *
+ * NOTE: When operating on 32KHz certain PHY registers (27 - 31,
+ * 123 - 127) require delay on access.
+ */
+static void
+ath5k_hw_set_sleep_clock(struct ath5k_hw *ah, bool enable)
+{
+ struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
+ u32 scal, spending, sclock;
+
+ /* Only set 32KHz settings if we have an external
+ * 32KHz crystal present */
+ if ((AR5K_EEPROM_HAS32KHZCRYSTAL(ee->ee_misc1) ||
+ AR5K_EEPROM_HAS32KHZCRYSTAL_OLD(ee->ee_misc1)) &&
+ enable) {
+
+ /* 1 usec/cycle */
+ AR5K_REG_WRITE_BITS(ah, AR5K_USEC_5211, AR5K_USEC_32, 1);
+ /* Set up tsf increment on each cycle */
+ AR5K_REG_WRITE_BITS(ah, AR5K_TSF_PARM, AR5K_TSF_PARM_INC, 61);
+
+ /* Set baseband sleep control registers
+ * and sleep control rate */
+ ath5k_hw_reg_write(ah, 0x1f, AR5K_PHY_SCR);
+
+ if ((ah->ah_radio == AR5K_RF5112) ||
+ (ah->ah_radio == AR5K_RF5413) ||
+ (ah->ah_radio == AR5K_RF2316) ||
+ (ah->ah_mac_version == (AR5K_SREV_AR2417 >> 4)))
+ spending = 0x14;
+ else
+ spending = 0x18;
+ ath5k_hw_reg_write(ah, spending, AR5K_PHY_SPENDING);
+
+ if ((ah->ah_radio == AR5K_RF5112) ||
+ (ah->ah_radio == AR5K_RF5413) ||
+ (ah->ah_mac_version == (AR5K_SREV_AR2417 >> 4))) {
+ ath5k_hw_reg_write(ah, 0x26, AR5K_PHY_SLMT);
+ ath5k_hw_reg_write(ah, 0x0d, AR5K_PHY_SCAL);
+ ath5k_hw_reg_write(ah, 0x07, AR5K_PHY_SCLOCK);
+ ath5k_hw_reg_write(ah, 0x3f, AR5K_PHY_SDELAY);
+ AR5K_REG_WRITE_BITS(ah, AR5K_PCICFG,
+ AR5K_PCICFG_SLEEP_CLOCK_RATE, 0x02);
+ } else {
+ ath5k_hw_reg_write(ah, 0x0a, AR5K_PHY_SLMT);
+ ath5k_hw_reg_write(ah, 0x0c, AR5K_PHY_SCAL);
+ ath5k_hw_reg_write(ah, 0x03, AR5K_PHY_SCLOCK);
+ ath5k_hw_reg_write(ah, 0x20, AR5K_PHY_SDELAY);
+ AR5K_REG_WRITE_BITS(ah, AR5K_PCICFG,
+ AR5K_PCICFG_SLEEP_CLOCK_RATE, 0x03);
+ }
+
+ /* Enable sleep clock operation */
+ AR5K_REG_ENABLE_BITS(ah, AR5K_PCICFG,
+ AR5K_PCICFG_SLEEP_CLOCK_EN);
+
+ } else {
+
+ /* Disable sleep clock operation and
+ * restore default parameters */
+ AR5K_REG_DISABLE_BITS(ah, AR5K_PCICFG,
+ AR5K_PCICFG_SLEEP_CLOCK_EN);
+
+ AR5K_REG_WRITE_BITS(ah, AR5K_PCICFG,
+ AR5K_PCICFG_SLEEP_CLOCK_RATE, 0);
+
+ /* Set DAC/ADC delays */
+ ath5k_hw_reg_write(ah, 0x1f, AR5K_PHY_SCR);
+ ath5k_hw_reg_write(ah, AR5K_PHY_SLMT_32MHZ, AR5K_PHY_SLMT);
+
+ if (ah->ah_mac_version == (AR5K_SREV_AR2417 >> 4))
+ scal = AR5K_PHY_SCAL_32MHZ_2417;
+ else if (ee->ee_is_hb63)
+ scal = AR5K_PHY_SCAL_32MHZ_HB63;
+ else
+ scal = AR5K_PHY_SCAL_32MHZ;
+ ath5k_hw_reg_write(ah, scal, AR5K_PHY_SCAL);
+
+ ath5k_hw_reg_write(ah, AR5K_PHY_SCLOCK_32MHZ, AR5K_PHY_SCLOCK);
+ ath5k_hw_reg_write(ah, AR5K_PHY_SDELAY_32MHZ, AR5K_PHY_SDELAY);
+
+ if ((ah->ah_radio == AR5K_RF5112) ||
+ (ah->ah_radio == AR5K_RF5413) ||
+ (ah->ah_radio == AR5K_RF2316) ||
+ (ah->ah_mac_version == (AR5K_SREV_AR2417 >> 4)))
+ spending = 0x14;
+ else
+ spending = 0x18;
+ ath5k_hw_reg_write(ah, spending, AR5K_PHY_SPENDING);
+
+ /* Set up tsf increment on each cycle */
+ AR5K_REG_WRITE_BITS(ah, AR5K_TSF_PARM, AR5K_TSF_PARM_INC, 1);
+
+ if ((ah->ah_radio == AR5K_RF5112) ||
+ (ah->ah_radio == AR5K_RF5413) ||
+ (ah->ah_radio == AR5K_RF2316) ||
+ (ah->ah_radio == AR5K_RF2317))
+ sclock = 40 - 1;
+ else
+ sclock = 32 - 1;
+ AR5K_REG_WRITE_BITS(ah, AR5K_USEC_5211, AR5K_USEC_32, sclock);
+ }
+}
+
+
+/*********************\
+* Reset/Sleep control *
+\*********************/
+
+/**
+ * ath5k_hw_nic_reset() - Reset the various chipset units
+ * @ah: The &struct ath5k_hw
+ * @val: Mask to indicate what units to reset
+ *
+ * To reset the various chipset units we need to write
+ * the mask to AR5K_RESET_CTL and poll the register until
+ * all flags are cleared.
+ *
+ * Returns 0 if we are O.K. or -EAGAIN (from athk5_hw_register_timeout)
+ */
+static int
+ath5k_hw_nic_reset(struct ath5k_hw *ah, u32 val)
+{
+ int ret;
+ u32 mask = val ? val : ~0U;
+
+ /* Read-and-clear RX Descriptor Pointer*/
+ ath5k_hw_reg_read(ah, AR5K_RXDP);
+
+ /*
+ * Reset the device and wait until success
+ */
+ ath5k_hw_reg_write(ah, val, AR5K_RESET_CTL);
+
+ /* Wait at least 128 PCI clocks */
+ usleep_range(15, 20);
+
+ if (ah->ah_version == AR5K_AR5210) {
+ val &= AR5K_RESET_CTL_PCU | AR5K_RESET_CTL_DMA
+ | AR5K_RESET_CTL_MAC | AR5K_RESET_CTL_PHY;
+ mask &= AR5K_RESET_CTL_PCU | AR5K_RESET_CTL_DMA
+ | AR5K_RESET_CTL_MAC | AR5K_RESET_CTL_PHY;
+ } else {
+ val &= AR5K_RESET_CTL_PCU | AR5K_RESET_CTL_BASEBAND;
+ mask &= AR5K_RESET_CTL_PCU | AR5K_RESET_CTL_BASEBAND;
+ }
+
+ ret = ath5k_hw_register_timeout(ah, AR5K_RESET_CTL, mask, val, false);
+
+ /*
+ * Reset configuration register (for hw byte-swap). Note that this
+ * is only set for big endian. We do the necessary magic in
+ * AR5K_INIT_CFG.
+ */
+ if ((val & AR5K_RESET_CTL_PCU) == 0)
+ ath5k_hw_reg_write(ah, AR5K_INIT_CFG, AR5K_CFG);
+
+ return ret;
+}
+
+/**
+ * ath5k_hw_wisoc_reset() - Reset AHB chipset
+ * @ah: The &struct ath5k_hw
+ * @flags: Mask to indicate what units to reset
+ *
+ * Same as ath5k_hw_nic_reset but for AHB based devices
+ *
+ * Returns 0 if we are O.K. or -EAGAIN (from athk5_hw_register_timeout)
+ */
+static int
+ath5k_hw_wisoc_reset(struct ath5k_hw *ah, u32 flags)
+{
+ u32 mask = flags ? flags : ~0U;
+ u32 __iomem *reg;
+ u32 regval;
+ u32 val = 0;
+
+ /* ah->ah_mac_srev is not available at this point yet */
+ if (ah->devid >= AR5K_SREV_AR2315_R6) {
+ reg = (u32 __iomem *) AR5K_AR2315_RESET;
+ if (mask & AR5K_RESET_CTL_PCU)
+ val |= AR5K_AR2315_RESET_WMAC;
+ if (mask & AR5K_RESET_CTL_BASEBAND)
+ val |= AR5K_AR2315_RESET_BB_WARM;
+ } else {
+ reg = (u32 __iomem *) AR5K_AR5312_RESET;
+ if (to_platform_device(ah->dev)->id == 0) {
+ if (mask & AR5K_RESET_CTL_PCU)
+ val |= AR5K_AR5312_RESET_WMAC0;
+ if (mask & AR5K_RESET_CTL_BASEBAND)
+ val |= AR5K_AR5312_RESET_BB0_COLD |
+ AR5K_AR5312_RESET_BB0_WARM;
+ } else {
+ if (mask & AR5K_RESET_CTL_PCU)
+ val |= AR5K_AR5312_RESET_WMAC1;
+ if (mask & AR5K_RESET_CTL_BASEBAND)
+ val |= AR5K_AR5312_RESET_BB1_COLD |
+ AR5K_AR5312_RESET_BB1_WARM;
+ }
+ }
+
+ /* Put BB/MAC into reset */
+ regval = ioread32(reg);
+ iowrite32(regval | val, reg);
+ regval = ioread32(reg);
+ udelay(100); /* NB: should be atomic */
+
+ /* Bring BB/MAC out of reset */
+ iowrite32(regval & ~val, reg);
+ regval = ioread32(reg);
+
+ /*
+ * Reset configuration register (for hw byte-swap). Note that this
+ * is only set for big endian. We do the necessary magic in
+ * AR5K_INIT_CFG.
+ */
+ if ((flags & AR5K_RESET_CTL_PCU) == 0)
+ ath5k_hw_reg_write(ah, AR5K_INIT_CFG, AR5K_CFG);
+
+ return 0;
+}
+
+/**
+ * ath5k_hw_set_power_mode() - Set power mode
+ * @ah: The &struct ath5k_hw
+ * @mode: One of enum ath5k_power_mode
+ * @set_chip: Set to true to write sleep control register
+ * @sleep_duration: How much time the device is allowed to sleep
+ * when sleep logic is enabled (in 128 microsecond increments).
+ *
+ * This function is used to configure sleep policy and allowed
+ * sleep modes. For more information check out the sleep control
+ * register on reg.h and STA_ID1.
+ *
+ * Returns 0 on success, -EIO if chip didn't wake up or -EINVAL if an invalid
+ * mode is requested.
+ */
+static int
+ath5k_hw_set_power_mode(struct ath5k_hw *ah, enum ath5k_power_mode mode,
+ bool set_chip, u16 sleep_duration)
+{
+ unsigned int i;
+ u32 staid, data;
+
+ staid = ath5k_hw_reg_read(ah, AR5K_STA_ID1);
+
+ switch (mode) {
+ case AR5K_PM_AUTO:
+ staid &= ~AR5K_STA_ID1_DEFAULT_ANTENNA;
+ /* fallthrough */
+ case AR5K_PM_NETWORK_SLEEP:
+ if (set_chip)
+ ath5k_hw_reg_write(ah,
+ AR5K_SLEEP_CTL_SLE_ALLOW |
+ sleep_duration,
+ AR5K_SLEEP_CTL);
+
+ staid |= AR5K_STA_ID1_PWR_SV;
+ break;
+
+ case AR5K_PM_FULL_SLEEP:
+ if (set_chip)
+ ath5k_hw_reg_write(ah, AR5K_SLEEP_CTL_SLE_SLP,
+ AR5K_SLEEP_CTL);
+
+ staid |= AR5K_STA_ID1_PWR_SV;
+ break;
+
+ case AR5K_PM_AWAKE:
+
+ staid &= ~AR5K_STA_ID1_PWR_SV;
+
+ if (!set_chip)
+ goto commit;
+
+ data = ath5k_hw_reg_read(ah, AR5K_SLEEP_CTL);
+
+ /* If card is down we 'll get 0xffff... so we
+ * need to clean this up before we write the register
+ */
+ if (data & 0xffc00000)
+ data = 0;
+ else
+ /* Preserve sleep duration etc */
+ data = data & ~AR5K_SLEEP_CTL_SLE;
+
+ ath5k_hw_reg_write(ah, data | AR5K_SLEEP_CTL_SLE_WAKE,
+ AR5K_SLEEP_CTL);
+ usleep_range(15, 20);
+
+ for (i = 200; i > 0; i--) {
+ /* Check if the chip did wake up */
+ if ((ath5k_hw_reg_read(ah, AR5K_PCICFG) &
+ AR5K_PCICFG_SPWR_DN) == 0)
+ break;
+
+ /* Wait a bit and retry */
+ usleep_range(50, 75);
+ ath5k_hw_reg_write(ah, data | AR5K_SLEEP_CTL_SLE_WAKE,
+ AR5K_SLEEP_CTL);
+ }
+
+ /* Fail if the chip didn't wake up */
+ if (i == 0)
+ return -EIO;
+
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+commit:
+ ath5k_hw_reg_write(ah, staid, AR5K_STA_ID1);
+
+ return 0;
+}
+
+/**
+ * ath5k_hw_on_hold() - Put device on hold
+ * @ah: The &struct ath5k_hw
+ *
+ * Put MAC and Baseband on warm reset and keep that state
+ * (don't clean sleep control register). After this MAC
+ * and Baseband are disabled and a full reset is needed
+ * to come back. This way we save as much power as possible
+ * without putting the card on full sleep.
+ *
+ * Returns 0 on success or -EIO on error
+ */
+int
+ath5k_hw_on_hold(struct ath5k_hw *ah)
+{
+ struct pci_dev *pdev = ah->pdev;
+ u32 bus_flags;
+ int ret;
+
+ if (ath5k_get_bus_type(ah) == ATH_AHB)
+ return 0;
+
+ /* Make sure device is awake */
+ ret = ath5k_hw_set_power_mode(ah, AR5K_PM_AWAKE, true, 0);
+ if (ret) {
+ ATH5K_ERR(ah, "failed to wakeup the MAC Chip\n");
+ return ret;
+ }
+
+ /*
+ * Put chipset on warm reset...
+ *
+ * Note: putting PCI core on warm reset on PCI-E cards
+ * results card to hang and always return 0xffff... so
+ * we ignore that flag for PCI-E cards. On PCI cards
+ * this flag gets cleared after 64 PCI clocks.
+ */
+ bus_flags = (pdev && pci_is_pcie(pdev)) ? 0 : AR5K_RESET_CTL_PCI;
+
+ if (ah->ah_version == AR5K_AR5210) {
+ ret = ath5k_hw_nic_reset(ah, AR5K_RESET_CTL_PCU |
+ AR5K_RESET_CTL_MAC | AR5K_RESET_CTL_DMA |
+ AR5K_RESET_CTL_PHY | AR5K_RESET_CTL_PCI);
+ usleep_range(2000, 2500);
+ } else {
+ ret = ath5k_hw_nic_reset(ah, AR5K_RESET_CTL_PCU |
+ AR5K_RESET_CTL_BASEBAND | bus_flags);
+ }
+
+ if (ret) {
+ ATH5K_ERR(ah, "failed to put device on warm reset\n");
+ return -EIO;
+ }
+
+ /* ...wakeup again!*/
+ ret = ath5k_hw_set_power_mode(ah, AR5K_PM_AWAKE, true, 0);
+ if (ret) {
+ ATH5K_ERR(ah, "failed to put device on hold\n");
+ return ret;
+ }
+
+ return ret;
+}
+
+/**
+ * ath5k_hw_nic_wakeup() - Force card out of sleep
+ * @ah: The &struct ath5k_hw
+ * @channel: The &struct ieee80211_channel
+ *
+ * Bring up MAC + PHY Chips and program PLL
+ * NOTE: Channel is NULL for the initial wakeup.
+ *
+ * Returns 0 on success, -EIO on hw failure or -EINVAL for false channel infos
+ */
+int
+ath5k_hw_nic_wakeup(struct ath5k_hw *ah, struct ieee80211_channel *channel)
+{
+ struct pci_dev *pdev = ah->pdev;
+ u32 turbo, mode, clock, bus_flags;
+ int ret;
+
+ turbo = 0;
+ mode = 0;
+ clock = 0;
+
+ if ((ath5k_get_bus_type(ah) != ATH_AHB) || channel) {
+ /* Wakeup the device */
+ ret = ath5k_hw_set_power_mode(ah, AR5K_PM_AWAKE, true, 0);
+ if (ret) {
+ ATH5K_ERR(ah, "failed to wakeup the MAC Chip\n");
+ return ret;
+ }
+ }
+
+ /*
+ * Put chipset on warm reset...
+ *
+ * Note: putting PCI core on warm reset on PCI-E cards
+ * results card to hang and always return 0xffff... so
+ * we ignore that flag for PCI-E cards. On PCI cards
+ * this flag gets cleared after 64 PCI clocks.
+ */
+ bus_flags = (pdev && pci_is_pcie(pdev)) ? 0 : AR5K_RESET_CTL_PCI;
+
+ if (ah->ah_version == AR5K_AR5210) {
+ ret = ath5k_hw_nic_reset(ah, AR5K_RESET_CTL_PCU |
+ AR5K_RESET_CTL_MAC | AR5K_RESET_CTL_DMA |
+ AR5K_RESET_CTL_PHY | AR5K_RESET_CTL_PCI);
+ usleep_range(2000, 2500);
+ } else {
+ if (ath5k_get_bus_type(ah) == ATH_AHB)
+ ret = ath5k_hw_wisoc_reset(ah, AR5K_RESET_CTL_PCU |
+ AR5K_RESET_CTL_BASEBAND);
+ else
+ ret = ath5k_hw_nic_reset(ah, AR5K_RESET_CTL_PCU |
+ AR5K_RESET_CTL_BASEBAND | bus_flags);
+ }
+
+ if (ret) {
+ ATH5K_ERR(ah, "failed to reset the MAC Chip\n");
+ return -EIO;
+ }
+
+ /* ...wakeup again!...*/
+ ret = ath5k_hw_set_power_mode(ah, AR5K_PM_AWAKE, true, 0);
+ if (ret) {
+ ATH5K_ERR(ah, "failed to resume the MAC Chip\n");
+ return ret;
+ }
+
+ /* ...reset configuration register on Wisoc ...
+ * ...clear reset control register and pull device out of
+ * warm reset on others */
+ if (ath5k_get_bus_type(ah) == ATH_AHB)
+ ret = ath5k_hw_wisoc_reset(ah, 0);
+ else
+ ret = ath5k_hw_nic_reset(ah, 0);
+
+ if (ret) {
+ ATH5K_ERR(ah, "failed to warm reset the MAC Chip\n");
+ return -EIO;
+ }
+
+ /* On initialization skip PLL programming since we don't have
+ * a channel / mode set yet */
+ if (!channel)
+ return 0;
+
+ if (ah->ah_version != AR5K_AR5210) {
+ /*
+ * Get channel mode flags
+ */
+
+ if (ah->ah_radio >= AR5K_RF5112) {
+ mode = AR5K_PHY_MODE_RAD_RF5112;
+ clock = AR5K_PHY_PLL_RF5112;
+ } else {
+ mode = AR5K_PHY_MODE_RAD_RF5111; /*Zero*/
+ clock = AR5K_PHY_PLL_RF5111; /*Zero*/
+ }
+
+ if (channel->band == IEEE80211_BAND_2GHZ) {
+ mode |= AR5K_PHY_MODE_FREQ_2GHZ;
+ clock |= AR5K_PHY_PLL_44MHZ;
+
+ if (channel->hw_value == AR5K_MODE_11B) {
+ mode |= AR5K_PHY_MODE_MOD_CCK;
+ } else {
+ /* XXX Dynamic OFDM/CCK is not supported by the
+ * AR5211 so we set MOD_OFDM for plain g (no
+ * CCK headers) operation. We need to test
+ * this, 5211 might support ofdm-only g after
+ * all, there are also initial register values
+ * in the code for g mode (see initvals.c).
+ */
+ if (ah->ah_version == AR5K_AR5211)
+ mode |= AR5K_PHY_MODE_MOD_OFDM;
+ else
+ mode |= AR5K_PHY_MODE_MOD_DYN;
+ }
+ } else if (channel->band == IEEE80211_BAND_5GHZ) {
+ mode |= (AR5K_PHY_MODE_FREQ_5GHZ |
+ AR5K_PHY_MODE_MOD_OFDM);
+
+ /* Different PLL setting for 5413 */
+ if (ah->ah_radio == AR5K_RF5413)
+ clock = AR5K_PHY_PLL_40MHZ_5413;
+ else
+ clock |= AR5K_PHY_PLL_40MHZ;
+ } else {
+ ATH5K_ERR(ah, "invalid radio frequency mode\n");
+ return -EINVAL;
+ }
+
+ /*XXX: Can bwmode be used with dynamic mode ?
+ * (I don't think it supports 44MHz) */
+ /* On 2425 initvals TURBO_SHORT is not present */
+ if (ah->ah_bwmode == AR5K_BWMODE_40MHZ) {
+ turbo = AR5K_PHY_TURBO_MODE;
+ if (ah->ah_radio != AR5K_RF2425)
+ turbo |= AR5K_PHY_TURBO_SHORT;
+ } else if (ah->ah_bwmode != AR5K_BWMODE_DEFAULT) {
+ if (ah->ah_radio == AR5K_RF5413) {
+ mode |= (ah->ah_bwmode == AR5K_BWMODE_10MHZ) ?
+ AR5K_PHY_MODE_HALF_RATE :
+ AR5K_PHY_MODE_QUARTER_RATE;
+ } else if (ah->ah_version == AR5K_AR5212) {
+ clock |= (ah->ah_bwmode == AR5K_BWMODE_10MHZ) ?
+ AR5K_PHY_PLL_HALF_RATE :
+ AR5K_PHY_PLL_QUARTER_RATE;
+ }
+ }
+
+ } else { /* Reset the device */
+
+ /* ...enable Atheros turbo mode if requested */
+ if (ah->ah_bwmode == AR5K_BWMODE_40MHZ)
+ ath5k_hw_reg_write(ah, AR5K_PHY_TURBO_MODE,
+ AR5K_PHY_TURBO);
+ }
+
+ if (ah->ah_version != AR5K_AR5210) {
+
+ /* ...update PLL if needed */
+ if (ath5k_hw_reg_read(ah, AR5K_PHY_PLL) != clock) {
+ ath5k_hw_reg_write(ah, clock, AR5K_PHY_PLL);
+ usleep_range(300, 350);
+ }
+
+ /* ...set the PHY operating mode */
+ ath5k_hw_reg_write(ah, mode, AR5K_PHY_MODE);
+ ath5k_hw_reg_write(ah, turbo, AR5K_PHY_TURBO);
+ }
+
+ return 0;
+}
+
+
+/**************************************\
+* Post-initvals register modifications *
+\**************************************/
+
+/**
+ * ath5k_hw_tweak_initval_settings() - Tweak initial settings
+ * @ah: The &struct ath5k_hw
+ * @channel: The &struct ieee80211_channel
+ *
+ * Some settings are not handled on initvals, e.g. bwmode
+ * settings, some phy settings, workarounds etc that in general
+ * don't fit anywhere else or are too small to introduce a separate
+ * function for each one. So we have this function to handle
+ * them all during reset and complete card's initialization.
+ */
+static void
+ath5k_hw_tweak_initval_settings(struct ath5k_hw *ah,
+ struct ieee80211_channel *channel)
+{
+ if (ah->ah_version == AR5K_AR5212 &&
+ ah->ah_phy_revision >= AR5K_SREV_PHY_5212A) {
+
+ /* Setup ADC control */
+ ath5k_hw_reg_write(ah,
+ (AR5K_REG_SM(2,
+ AR5K_PHY_ADC_CTL_INBUFGAIN_OFF) |
+ AR5K_REG_SM(2,
+ AR5K_PHY_ADC_CTL_INBUFGAIN_ON) |
+ AR5K_PHY_ADC_CTL_PWD_DAC_OFF |
+ AR5K_PHY_ADC_CTL_PWD_ADC_OFF),
+ AR5K_PHY_ADC_CTL);
+
+
+
+ /* Disable barker RSSI threshold */
+ AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_DAG_CCK_CTL,
+ AR5K_PHY_DAG_CCK_CTL_EN_RSSI_THR);
+
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_DAG_CCK_CTL,
+ AR5K_PHY_DAG_CCK_CTL_RSSI_THR, 2);
+
+ /* Set the mute mask */
+ ath5k_hw_reg_write(ah, 0x0000000f, AR5K_SEQ_MASK);
+ }
+
+ /* Clear PHY_BLUETOOTH to allow RX_CLEAR line debug */
+ if (ah->ah_phy_revision >= AR5K_SREV_PHY_5212B)
+ ath5k_hw_reg_write(ah, 0, AR5K_PHY_BLUETOOTH);
+
+ /* Enable DCU double buffering */
+ if (ah->ah_phy_revision > AR5K_SREV_PHY_5212B)
+ AR5K_REG_DISABLE_BITS(ah, AR5K_TXCFG,
+ AR5K_TXCFG_DCU_DBL_BUF_DIS);
+
+ /* Set fast ADC */
+ if ((ah->ah_radio == AR5K_RF5413) ||
+ (ah->ah_radio == AR5K_RF2317) ||
+ (ah->ah_mac_version == (AR5K_SREV_AR2417 >> 4))) {
+ u32 fast_adc = true;
+
+ if (channel->center_freq == 2462 ||
+ channel->center_freq == 2467)
+ fast_adc = 0;
+
+ /* Only update if needed */
+ if (ath5k_hw_reg_read(ah, AR5K_PHY_FAST_ADC) != fast_adc)
+ ath5k_hw_reg_write(ah, fast_adc,
+ AR5K_PHY_FAST_ADC);
+ }
+
+ /* Fix for first revision of the RF5112 RF chipset */
+ if (ah->ah_radio == AR5K_RF5112 &&
+ ah->ah_radio_5ghz_revision <
+ AR5K_SREV_RAD_5112A) {
+ u32 data;
+ ath5k_hw_reg_write(ah, AR5K_PHY_CCKTXCTL_WORLD,
+ AR5K_PHY_CCKTXCTL);
+ if (channel->band == IEEE80211_BAND_5GHZ)
+ data = 0xffb81020;
+ else
+ data = 0xffb80d20;
+ ath5k_hw_reg_write(ah, data, AR5K_PHY_FRAME_CTL);
+ }
+
+ if (ah->ah_mac_srev < AR5K_SREV_AR5211) {
+ /* Clear QCU/DCU clock gating register */
+ ath5k_hw_reg_write(ah, 0, AR5K_QCUDCU_CLKGT);
+ /* Set DAC/ADC delays */
+ ath5k_hw_reg_write(ah, AR5K_PHY_SCAL_32MHZ_5311,
+ AR5K_PHY_SCAL);
+ /* Enable PCU FIFO corruption ECO */
+ AR5K_REG_ENABLE_BITS(ah, AR5K_DIAG_SW_5211,
+ AR5K_DIAG_SW_ECO_ENABLE);
+ }
+
+ if (ah->ah_bwmode) {
+ /* Increase PHY switch and AGC settling time
+ * on turbo mode (ath5k_hw_commit_eeprom_settings
+ * will override settling time if available) */
+ if (ah->ah_bwmode == AR5K_BWMODE_40MHZ) {
+
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_SETTLING,
+ AR5K_PHY_SETTLING_AGC,
+ AR5K_AGC_SETTLING_TURBO);
+
+ /* XXX: Initvals indicate we only increase
+ * switch time on AR5212, 5211 and 5210
+ * only change agc time (bug?) */
+ if (ah->ah_version == AR5K_AR5212)
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_SETTLING,
+ AR5K_PHY_SETTLING_SWITCH,
+ AR5K_SWITCH_SETTLING_TURBO);
+
+ if (ah->ah_version == AR5K_AR5210) {
+ /* Set Frame Control Register */
+ ath5k_hw_reg_write(ah,
+ (AR5K_PHY_FRAME_CTL_INI |
+ AR5K_PHY_TURBO_MODE |
+ AR5K_PHY_TURBO_SHORT | 0x2020),
+ AR5K_PHY_FRAME_CTL_5210);
+ }
+ /* On 5413 PHY force window length for half/quarter rate*/
+ } else if ((ah->ah_mac_srev >= AR5K_SREV_AR5424) &&
+ (ah->ah_mac_srev <= AR5K_SREV_AR5414)) {
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_FRAME_CTL_5211,
+ AR5K_PHY_FRAME_CTL_WIN_LEN,
+ 3);
+ }
+ } else if (ah->ah_version == AR5K_AR5210) {
+ /* Set Frame Control Register for normal operation */
+ ath5k_hw_reg_write(ah, (AR5K_PHY_FRAME_CTL_INI | 0x1020),
+ AR5K_PHY_FRAME_CTL_5210);
+ }
+}
+
+/**
+ * ath5k_hw_commit_eeprom_settings() - Commit settings from EEPROM
+ * @ah: The &struct ath5k_hw
+ * @channel: The &struct ieee80211_channel
+ *
+ * Use settings stored on EEPROM to properly initialize the card
+ * based on various infos and per-mode calibration data.
+ */
+static void
+ath5k_hw_commit_eeprom_settings(struct ath5k_hw *ah,
+ struct ieee80211_channel *channel)
+{
+ struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
+ s16 cck_ofdm_pwr_delta;
+ u8 ee_mode;
+
+ /* TODO: Add support for AR5210 EEPROM */
+ if (ah->ah_version == AR5K_AR5210)
+ return;
+
+ ee_mode = ath5k_eeprom_mode_from_channel(ah, channel);
+
+ /* Adjust power delta for channel 14 */
+ if (channel->center_freq == 2484)
+ cck_ofdm_pwr_delta =
+ ((ee->ee_cck_ofdm_power_delta -
+ ee->ee_scaled_cck_delta) * 2) / 10;
+ else
+ cck_ofdm_pwr_delta =
+ (ee->ee_cck_ofdm_power_delta * 2) / 10;
+
+ /* Set CCK to OFDM power delta on tx power
+ * adjustment register */
+ if (ah->ah_phy_revision >= AR5K_SREV_PHY_5212A) {
+ if (channel->hw_value == AR5K_MODE_11G)
+ ath5k_hw_reg_write(ah,
+ AR5K_REG_SM((ee->ee_cck_ofdm_gain_delta * -1),
+ AR5K_PHY_TX_PWR_ADJ_CCK_GAIN_DELTA) |
+ AR5K_REG_SM((cck_ofdm_pwr_delta * -1),
+ AR5K_PHY_TX_PWR_ADJ_CCK_PCDAC_INDEX),
+ AR5K_PHY_TX_PWR_ADJ);
+ else
+ ath5k_hw_reg_write(ah, 0, AR5K_PHY_TX_PWR_ADJ);
+ } else {
+ /* For older revs we scale power on sw during tx power
+ * setup */
+ ah->ah_txpower.txp_cck_ofdm_pwr_delta = cck_ofdm_pwr_delta;
+ ah->ah_txpower.txp_cck_ofdm_gainf_delta =
+ ee->ee_cck_ofdm_gain_delta;
+ }
+
+ /* XXX: necessary here? is called from ath5k_hw_set_antenna_mode()
+ * too */
+ ath5k_hw_set_antenna_switch(ah, ee_mode);
+
+ /* Noise floor threshold */
+ ath5k_hw_reg_write(ah,
+ AR5K_PHY_NF_SVAL(ee->ee_noise_floor_thr[ee_mode]),
+ AR5K_PHY_NFTHRES);
+
+ if ((ah->ah_bwmode == AR5K_BWMODE_40MHZ) &&
+ (ah->ah_ee_version >= AR5K_EEPROM_VERSION_5_0)) {
+ /* Switch settling time (Turbo) */
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_SETTLING,
+ AR5K_PHY_SETTLING_SWITCH,
+ ee->ee_switch_settling_turbo[ee_mode]);
+
+ /* Tx/Rx attenuation (Turbo) */
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_GAIN,
+ AR5K_PHY_GAIN_TXRX_ATTEN,
+ ee->ee_atn_tx_rx_turbo[ee_mode]);
+
+ /* ADC/PGA desired size (Turbo) */
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_DESIRED_SIZE,
+ AR5K_PHY_DESIRED_SIZE_ADC,
+ ee->ee_adc_desired_size_turbo[ee_mode]);
+
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_DESIRED_SIZE,
+ AR5K_PHY_DESIRED_SIZE_PGA,
+ ee->ee_pga_desired_size_turbo[ee_mode]);
+
+ /* Tx/Rx margin (Turbo) */
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_GAIN_2GHZ,
+ AR5K_PHY_GAIN_2GHZ_MARGIN_TXRX,
+ ee->ee_margin_tx_rx_turbo[ee_mode]);
+
+ } else {
+ /* Switch settling time */
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_SETTLING,
+ AR5K_PHY_SETTLING_SWITCH,
+ ee->ee_switch_settling[ee_mode]);
+
+ /* Tx/Rx attenuation */
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_GAIN,
+ AR5K_PHY_GAIN_TXRX_ATTEN,
+ ee->ee_atn_tx_rx[ee_mode]);
+
+ /* ADC/PGA desired size */
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_DESIRED_SIZE,
+ AR5K_PHY_DESIRED_SIZE_ADC,
+ ee->ee_adc_desired_size[ee_mode]);
+
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_DESIRED_SIZE,
+ AR5K_PHY_DESIRED_SIZE_PGA,
+ ee->ee_pga_desired_size[ee_mode]);
+
+ /* Tx/Rx margin */
+ if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_4_1)
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_GAIN_2GHZ,
+ AR5K_PHY_GAIN_2GHZ_MARGIN_TXRX,
+ ee->ee_margin_tx_rx[ee_mode]);
+ }
+
+ /* XPA delays */
+ ath5k_hw_reg_write(ah,
+ (ee->ee_tx_end2xpa_disable[ee_mode] << 24) |
+ (ee->ee_tx_end2xpa_disable[ee_mode] << 16) |
+ (ee->ee_tx_frm2xpa_enable[ee_mode] << 8) |
+ (ee->ee_tx_frm2xpa_enable[ee_mode]), AR5K_PHY_RF_CTL4);
+
+ /* XLNA delay */
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_RF_CTL3,
+ AR5K_PHY_RF_CTL3_TXE2XLNA_ON,
+ ee->ee_tx_end2xlna_enable[ee_mode]);
+
+ /* Thresh64 (ANI) */
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_NF,
+ AR5K_PHY_NF_THRESH62,
+ ee->ee_thr_62[ee_mode]);
+
+ /* False detect backoff for channels
+ * that have spur noise. Write the new
+ * cyclic power RSSI threshold. */
+ if (ath5k_hw_chan_has_spur_noise(ah, channel))
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_OFDM_SELFCORR,
+ AR5K_PHY_OFDM_SELFCORR_CYPWR_THR1,
+ AR5K_INIT_CYCRSSI_THR1 +
+ ee->ee_false_detect[ee_mode]);
+ else
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_OFDM_SELFCORR,
+ AR5K_PHY_OFDM_SELFCORR_CYPWR_THR1,
+ AR5K_INIT_CYCRSSI_THR1);
+
+ /* I/Q correction (set enable bit last to match HAL sources) */
+ /* TODO: Per channel i/q infos ? */
+ if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_4_0) {
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_Q_I_COFF,
+ ee->ee_i_cal[ee_mode]);
+ AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_Q_Q_COFF,
+ ee->ee_q_cal[ee_mode]);
+ AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_ENABLE);
+ }
+
+ /* Heavy clipping -disable for now */
+ if (ah->ah_ee_version >= AR5K_EEPROM_VERSION_5_1)
+ ath5k_hw_reg_write(ah, 0, AR5K_PHY_HEAVY_CLIP_ENABLE);
+}
+
+
+/*********************\
+* Main reset function *
+\*********************/
+
+/**
+ * ath5k_hw_reset() - The main reset function
+ * @ah: The &struct ath5k_hw
+ * @op_mode: One of enum nl80211_iftype
+ * @channel: The &struct ieee80211_channel
+ * @fast: Enable fast channel switching
+ * @skip_pcu: Skip pcu initialization
+ *
+ * This is the function we call each time we want to (re)initialize the
+ * card and pass new settings to hw. We also call it when hw runs into
+ * trouble to make it come back to a working state.
+ *
+ * Returns 0 on success, -EINVAL on false op_mode or channel infos, or -EIO
+ * on failure.
+ */
+int
+ath5k_hw_reset(struct ath5k_hw *ah, enum nl80211_iftype op_mode,
+ struct ieee80211_channel *channel, bool fast, bool skip_pcu)
+{
+ u32 s_seq[10], s_led[3], tsf_up, tsf_lo;
+ u8 mode;
+ int i, ret;
+
+ tsf_up = 0;
+ tsf_lo = 0;
+ mode = 0;
+
+ /*
+ * Sanity check for fast flag
+ * Fast channel change only available
+ * on AR2413/AR5413.
+ */
+ if (fast && (ah->ah_radio != AR5K_RF2413) &&
+ (ah->ah_radio != AR5K_RF5413))
+ fast = false;
+
+ /* Disable sleep clock operation
+ * to avoid register access delay on certain
+ * PHY registers */
+ if (ah->ah_version == AR5K_AR5212)
+ ath5k_hw_set_sleep_clock(ah, false);
+
+ mode = channel->hw_value;
+ switch (mode) {
+ case AR5K_MODE_11A:
+ break;
+ case AR5K_MODE_11G:
+ if (ah->ah_version <= AR5K_AR5211) {
+ ATH5K_ERR(ah,
+ "G mode not available on 5210/5211");
+ return -EINVAL;
+ }
+ break;
+ case AR5K_MODE_11B:
+ if (ah->ah_version < AR5K_AR5211) {
+ ATH5K_ERR(ah,
+ "B mode not available on 5210");
+ return -EINVAL;
+ }
+ break;
+ default:
+ ATH5K_ERR(ah,
+ "invalid channel: %d\n", channel->center_freq);
+ return -EINVAL;
+ }
+
+ /*
+ * If driver requested fast channel change and DMA has stopped
+ * go on. If it fails continue with a normal reset.
+ */
+ if (fast) {
+ ret = ath5k_hw_phy_init(ah, channel, mode, true);
+ if (ret) {
+ ATH5K_DBG(ah, ATH5K_DEBUG_RESET,
+ "fast chan change failed, falling back to normal reset\n");
+ /* Non fatal, can happen eg.
+ * on mode change */
+ ret = 0;
+ } else {
+ ATH5K_DBG(ah, ATH5K_DEBUG_RESET,
+ "fast chan change successful\n");
+ return 0;
+ }
+ }
+
+ /*
+ * Save some registers before a reset
+ */
+ if (ah->ah_version != AR5K_AR5210) {
+ /*
+ * Save frame sequence count
+ * For revs. after Oahu, only save
+ * seq num for DCU 0 (Global seq num)
+ */
+ if (ah->ah_mac_srev < AR5K_SREV_AR5211) {
+
+ for (i = 0; i < 10; i++)
+ s_seq[i] = ath5k_hw_reg_read(ah,
+ AR5K_QUEUE_DCU_SEQNUM(i));
+
+ } else {
+ s_seq[0] = ath5k_hw_reg_read(ah,
+ AR5K_QUEUE_DCU_SEQNUM(0));
+ }
+
+ /* TSF accelerates on AR5211 during reset
+ * As a workaround save it here and restore
+ * it later so that it's back in time after
+ * reset. This way it'll get re-synced on the
+ * next beacon without breaking ad-hoc.
+ *
+ * On AR5212 TSF is almost preserved across a
+ * reset so it stays back in time anyway and
+ * we don't have to save/restore it.
+ *
+ * XXX: Since this breaks power saving we have
+ * to disable power saving until we receive the
+ * next beacon, so we can resync beacon timers */
+ if (ah->ah_version == AR5K_AR5211) {
+ tsf_up = ath5k_hw_reg_read(ah, AR5K_TSF_U32);
+ tsf_lo = ath5k_hw_reg_read(ah, AR5K_TSF_L32);
+ }
+ }
+
+
+ /*GPIOs*/
+ s_led[0] = ath5k_hw_reg_read(ah, AR5K_PCICFG) &
+ AR5K_PCICFG_LEDSTATE;
+ s_led[1] = ath5k_hw_reg_read(ah, AR5K_GPIOCR);
+ s_led[2] = ath5k_hw_reg_read(ah, AR5K_GPIODO);
+
+
+ /*
+ * Since we are going to write rf buffer
+ * check if we have any pending gain_F
+ * optimization settings
+ */
+ if (ah->ah_version == AR5K_AR5212 &&
+ (ah->ah_radio <= AR5K_RF5112)) {
+ if (!fast && ah->ah_rf_banks != NULL)
+ ath5k_hw_gainf_calibrate(ah);
+ }
+
+ /* Wakeup the device */
+ ret = ath5k_hw_nic_wakeup(ah, channel);
+ if (ret)
+ return ret;
+
+ /* PHY access enable */
+ if (ah->ah_mac_srev >= AR5K_SREV_AR5211)
+ ath5k_hw_reg_write(ah, AR5K_PHY_SHIFT_5GHZ, AR5K_PHY(0));
+ else
+ ath5k_hw_reg_write(ah, AR5K_PHY_SHIFT_5GHZ | 0x40,
+ AR5K_PHY(0));
+
+ /* Write initial settings */
+ ret = ath5k_hw_write_initvals(ah, mode, skip_pcu);
+ if (ret)
+ return ret;
+
+ /* Initialize core clock settings */
+ ath5k_hw_init_core_clock(ah);
+
+ /*
+ * Tweak initval settings for revised
+ * chipsets and add some more config
+ * bits
+ */
+ ath5k_hw_tweak_initval_settings(ah, channel);
+
+ /* Commit values from EEPROM */
+ ath5k_hw_commit_eeprom_settings(ah, channel);
+
+
+ /*
+ * Restore saved values
+ */
+
+ /* Seqnum, TSF */
+ if (ah->ah_version != AR5K_AR5210) {
+ if (ah->ah_mac_srev < AR5K_SREV_AR5211) {
+ for (i = 0; i < 10; i++)
+ ath5k_hw_reg_write(ah, s_seq[i],
+ AR5K_QUEUE_DCU_SEQNUM(i));
+ } else {
+ ath5k_hw_reg_write(ah, s_seq[0],
+ AR5K_QUEUE_DCU_SEQNUM(0));
+ }
+
+ if (ah->ah_version == AR5K_AR5211) {
+ ath5k_hw_reg_write(ah, tsf_up, AR5K_TSF_U32);
+ ath5k_hw_reg_write(ah, tsf_lo, AR5K_TSF_L32);
+ }
+ }
+
+ /* Ledstate */
+ AR5K_REG_ENABLE_BITS(ah, AR5K_PCICFG, s_led[0]);
+
+ /* Gpio settings */
+ ath5k_hw_reg_write(ah, s_led[1], AR5K_GPIOCR);
+ ath5k_hw_reg_write(ah, s_led[2], AR5K_GPIODO);
+
+ /*
+ * Initialize PCU
+ */
+ ath5k_hw_pcu_init(ah, op_mode);
+
+ /*
+ * Initialize PHY
+ */
+ ret = ath5k_hw_phy_init(ah, channel, mode, false);
+ if (ret) {
+ ATH5K_ERR(ah,
+ "failed to initialize PHY (%i) !\n", ret);
+ return ret;
+ }
+
+ /*
+ * Configure QCUs/DCUs
+ */
+ ret = ath5k_hw_init_queues(ah);
+ if (ret)
+ return ret;
+
+
+ /*
+ * Initialize DMA/Interrupts
+ */
+ ath5k_hw_dma_init(ah);
+
+
+ /*
+ * Enable 32KHz clock function for AR5212+ chips
+ * Set clocks to 32KHz operation and use an
+ * external 32KHz crystal when sleeping if one
+ * exists.
+ * Disabled by default because it is also disabled in
+ * other drivers and it is known to cause stability
+ * issues on some devices
+ */
+ if (ah->ah_use_32khz_clock && ah->ah_version == AR5K_AR5212 &&
+ op_mode != NL80211_IFTYPE_AP)
+ ath5k_hw_set_sleep_clock(ah, true);
+
+ /*
+ * Disable beacons and reset the TSF
+ */
+ AR5K_REG_DISABLE_BITS(ah, AR5K_BEACON, AR5K_BEACON_ENABLE);
+ ath5k_hw_reset_tsf(ah);
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff